Correct option is A
The correct answer is: (A) between 2nd to 13(3-12)
Explanation:
D-block elements are also called transition elements.
They are located in periodic table groups 3 to 12, which lie between s-block (groups 1–2) and p-block (groups 13–18).
Their distinguishing feature is the filling of d-orbitals.
They exhibit typical metallic properties, variable oxidation states, and form colored compounds.
Information Booster:
D-block elements include elements like Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn.
They are good conductors of heat and electricity.
They often form complexes and alloys.
D-block elements are mostly hard and have high melting points.
They are widely used in industries, electronics, and catalysis.
Additional Knowledge:
Option B, C, D are incorrect because d-block elements are not limited to any single group; they span 10 groups (3–12).
Group 18 contains noble gases (p-block).
Group 8 alone contains only Fe, Ru, Os.
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